Take a look at the 3rd and 4th screen shot of the game, then read the comment made just below the pics.
http://www.amdzone.com/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=80&page=3
http://www.amdzone.com/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=80&page=3